Roof drain



Dec. 29,1931. J. c. CROMW ELL "R00? DRAIN Original Filed Aug. 19, 1924INVENTOR P atented Dec. 29, 193i STATES JOHN C. CROMWELL, F ALLIANCE,OHIO, ASSIGNOR 'IO THE TESTI'IE COMPANY, OF

COLUMBUS, OHIO, A CORPORATION OF OHIO V ROOF DRAIN Original applicationfiled August 19, 1924, Serial No. 732,893. Divided and this applicationfiled 1929. Serial The present invention relates broadly to roof drainsand has for one of its objects the provision of a drain of thischaracter having a removable strainer detachably held in position andcentered by the holding means.

Another object of the invention is to provide detachable clamping meansfor the roofing material, the clamping means being so constructed as tofacilitate the drainage of water from the roof into the drain whilepreventing clogging thereof.

This application is a division of my copending application Serial No.732,893, filed August 19, 1924.

In the accompanying drawings I have shown for purposes of illustrationonly a preferred embodiment of the present invention, it bein understoodthat the drawings do not define the limits of the invention, as changesmay obviously be made in the construction without departing from thespirit of the invention or scope of my broader claims.

In the drawings,

Figure 1 is a top plan view of a portion of a roof having my improveddrain in position therein; and

Figure 2 is a vertical sectional view through the structure illustratedin Figure 1.

In carrying out the present invention there may be provided a drainagecup 2 having its upper portion enlarged to provide a water receivingspace 3 and having its lower end i contracted to cooperate with theupper end of the usual drainage or soil pipe.

Projecting outwardly from the upper edge ofthe enlarged chamber 3 is ahorizontally extending flange 5 adapted to be embedded in the roof withits upper surface substantially fiush with the upper surface of theroof. This permits the roofing material or covering 6 to be laidsmoothly both over the roof and over the flange 5. A portion of the bodyof the roofing material is preferably cut away to provide an openingslightly smaller than the diameter of the chamber 3, whereby there isprovided a surplus of material adapted to project downwardly into thechamber 3. For tightly clamping the roofing material in position, thereis preferably provided a detach- .Tuly 17, No. 328,940.

able clamping ring 7 having projecting therefrom a plurality of wedgeshaped clamping projections 8 adapted to form therebetween drainageopenings or recesses 9. Preferably the dimensions of the clamping ringwill be such that with the parts in clamping position, as clearly shownin Figure 2, the upper edge of the ring 7 will project above the levelof the roof. In this position the drainage of water into the cup 2 willbe permitted by reason of the openings 9, while the passage of foreignbodies of undue size will be checked by the clamping ring.

Projecting upwardly from the inner portion of the cup 2 arediametrically opposed lugs 10 having inwardly extending webs 11 formedwith openings 12. These webs are adapted to cooperate with andautomatically center a strainer 13 of substantially dome shape adaptedto project above the level of the roof and provided with a series ofdrain age openings 14. The base flange 15 of the strainer is preferablyprovided with diametrically opposite slots 16 and adapted to straddlethe webs 11. vVith the parts in assembled position locking pins or keys1'? may be passed through the openings 12 to prevent accidental removalof the strainer. At the same time, it will be apparent easy removal ofthe strainer is permitted by simply withdrawing the locking means 17.

The advantages of the present invention arise from the provision of aroof drain adapted to be easily positioned at any desirable point in aroof and having improved means for both clamping the roofing material inposition and controlling the passage of water to the interior of thedrain, while preventing the passage of foreign material thereto.

Further advantages arise from the provision of improved means fordetachably receiving and centering the strainer.

I claim:

1. In a roof drain, a drainage cup, and a clamping ringcooperating withthe cup, the ing having spaced projections portions of which form itsclamping surface.

2. In a roof drain, a drainage cup adapted to be embedded in a roof andformed with a lower portion for cooperation with a drain pipe, and adetachable clamping ring for clamping the roofing material against thecup, said ring having a plurality of periph eral openings.

3. In a roof drain, a drainage cup adapted to be embedded in a roof andhaving a lower portion for cooperation with a drain pipe,

and a detachable clamping ring for clamping the roofing material againstthe cup, the periphery of said ring being formed by a plurality ofalternate projections and depressions.

'4. In a roof drain, a'drainage' cup adapted to be embedded in a roofand having a lower portion for cooperation with a drain pipe, and adetachable clamping ring for clamping the roofing material against thecup, the periphery of said ring being formed by a plurality of alternatewedge shaped projections and depressions.

5. In a roof drain, a drainage cup, and a detachable clamping ringcooperating with said cnp, said clamping ring comprising an annular bodyhaving spaced wedge shaped projections thereon. Y

6. In a roof drain, a drainage cup adapted to be embedded in a roof andhaving a lower portion for cooperation with a drain pipe, andadetachable clamping ring for clamping the roofing material against thecup, said ring being adapted to project above the roof level, Whilepermitting the drainage of water from the roof below its upper edge.

In testimony whereof I have hereunto set my hand.

JOHN G. CROMWELL.

